PERRIN PSP-DRV-534 Rear Differential Lockdown Kit for Subaru WRX & STI

PERRIN Rear Differential Lockdown Kit – Subaru (PSP-DRV-534)

The PERRIN Rear Differential Lockdown Kit (PSP-DRV-534) is designed to reduce unwanted rear differential movement in early Subaru platforms. From the factory, soft rubber bushings allow the rear differential to shift under throttle, causing delayed power delivery and inconsistent drivetrain response.

By locking down the rear differential, this kit improves throttle response, drivetrain precision, and overall driving feel, making it an excellent upgrade for spirited street driving, autocross, and track use.

Key Features

• Reduces rear differential movement under acceleration and deceleration

• Improves throttle response and drivetrain consistency

• Helps eliminate drivetrain slop and delayed power transfer

• Ideal for performance-oriented Subaru builds

• Direct-fit replacement for factory bushings

What’s Included

• (4) Differential Lockout Bushings

• (2) Differential Support Beam Lockout Bushings

• Warranty & Instructions

Vehicle Fitment

Fits a wide range of Subaru models including:

• Impreza: 1993–2007 (WRX, WRX STI, RS, TS, Outback Sport, L, Brighton)

• WRX / WRX STI: 2002–2007

• Forester: 1998–2008 (Base, X, XS, XT, XT Limited, L.L. Bean Edition)

Designed for rear differentials found in early Subaru platforms using factory-style rear diff mounts.